Global Patent Index - EP 1935180 A4

EP 1935180 A4 20110511 - METHOD OF SCALABLE VIDEO CODING AND THE CODEC USING THE SAME

Title (en)

METHOD OF SCALABLE VIDEO CODING AND THE CODEC USING THE SAME

Title (de)

VERFAHREN ZUR SKALIERBAREN VIDEOCODIERUNG UND CODEC DAMIT

Title (fr)

PROCEDE DE CODAGE VIDEO ECHELONNABLE ET CODEC UTILISANT CE DERNIER

Publication

EP 1935180 A4 20110511 (EN)

Application

EP 06799153 A 20061010

Priority

  • KR 2006004073 W 20061010
  • KR 20050095222 A 20051011
  • KR 20060098098 A 20061009

Abstract (en)

[origin: WO2007043793A1] Since joint scalable video coding (JSVC) adopts a scheme in which numbers are assigned to all of the pictures according to the order in which the pictures are displayed, it is difficult to detect a drop (or loss) of a key picture and thus it is difficult to effectively take action against an error caused by the loss of the key picture. The present invention provides a coding method of detecting a loss of a key picture by numbering key pictures in JSVC in which predictive (P) pictures have a closed-loop structure and of effectively taking action against an error in the case of a loss of a key picture, and a codec using the coding method. The SVC method includes performing encoding while assigning a number to a key picture of an upper layer and performing decoding with respect to the number- encoded current key picture of the upper layer using data of a decoded image of a picture of a lower layer that is temporally matched with the current key picture of the upper layer when a loss of a key picture between the number-encoded current key picture of the upper layer and a previous key picture that is number-encoded prior to the current key picture is detected. Therefore, it is possible to effectively take action against to an error caused by a loss of a key picture by detecting the loss of a key picture during decoding by encoding using numbering of key pictures in JSVC in which closed-loop coding is performed by consecutively predicting key pictures. Moreover, it is possible to minimize degradation in image quality by concealing an error caused by an incorrect reference by using data of a decoded image of a corresponding picture of a lower base layer when a key picture of an upper layer is lost in an environment where transmission of the lower base layer is guaranteed with a video stream having a multi-layered structure.

IPC 8 full level

H04N 5/00 (2011.01); H04N 7/24 (2011.01); H04N 19/33 (2014.01); H04N 19/46 (2014.01); H04N 19/50 (2014.01); H04N 19/59 (2014.01); H04N 19/70 (2014.01); H04N 19/895 (2014.01)

CPC (source: EP KR US)

H04N 19/177 (2014.11 - KR); H04N 19/29 (2014.11 - EP US); H04N 19/30 (2014.11 - KR); H04N 19/33 (2014.11 - EP US); H04N 19/44 (2014.11 - EP US); H04N 19/46 (2014.11 - EP US); H04N 19/503 (2014.11 - EP US); H04N 19/61 (2014.11 - EP US); H04N 19/70 (2014.11 - EP US); H04N 19/89 (2014.11 - EP US); H04N 19/895 (2014.11 - EP KR US); H04N 21/2383 (2013.01 - EP US); H04N 21/2402 (2013.01 - EP US); H04N 21/2404 (2013.01 - EP US); H04N 21/2662 (2013.01 - EP US); H04N 21/40 (2013.01 - EP US)

Citation (search report)

  • [IY] YOON D H ET AL: "Key picture indication in AVC compatible base layer", ITU STUDY GROUP 16 - VIDEO CODING EXPERTS GROUP -ISO/IEC MPEG & ITU-T VCEG(ISO/IEC JTC1/SC29/WG11 AND ITU-T SG16 Q6), XX, XX, no. JVT-P079, 20 July 2005 (2005-07-20), XP030006116
  • [Y] SCHWARZ H ET AL: "Constrained Inter-Layer Prediction for Single-Loop Decoding in Spatial Scalability", IMAGE PROCESSING,2005. ICIP 2005,, vol. 2, 11 September 2005 (2005-09-11), pages 870 - 873, XP010851192, ISBN: 978-0-7803-9134-5, DOI: 10.1109/ICIP.2005.1530194
  • [XPY] JEONG S ET AL: "Numbering of Key pictures", ITU STUDY GROUP 16 - VIDEO CODING EXPERTS GROUP -ISO/IEC MPEG & ITU-T VCEG(ISO/IEC JTC1/SC29/WG11 AND ITU-T SG16 Q6), XX, XX, no. JVT-Q091, 12 October 2005 (2005-10-12), XP030006249
  • See references of WO 2007043793A1

Citation (examination)

  • THOMAS WIEGAND ET AL: "Adopted Method for Annex U", 10. VCEG MEETING; 16-05-2000 - 19-05-2000; OSAKA, JP; (VIDEO CODINGEXPERTS GROUP OF ITU-T SG.16),, no. q15j66, 23 May 2000 (2000-05-23), XP030003087, ISSN: 0000-0464
  • THOMAS STOCKHAMMER ET AL: "Flexible Protection Layer", 39. MPEG MEETING; 07-04-1997 - 11-04-1997; BRISTOL; (MOTION PICTUREEXPERT GROUP OR ISO/IEC JTC1/SC29/WG11),, no. M2169, 6 April 1997 (1997-04-06), XP030031454, ISSN: 0000-0321

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2007043793 A1 20070419; CN 101326828 A 20081217; CN 101326828 B 20110608; CN 101964909 A 20110202; CN 101964909 B 20120704; EP 1935180 A1 20080625; EP 1935180 A4 20110511; EP 2410751 A1 20120125; JP 2009512317 A 20090319; JP 2012182819 A 20120920; JP 2012231537 A 20121122; JP 5054015 B2 20121024; JP 5497855 B2 20140521; KR 100825737 B1 20080429; KR 20070040303 A 20070416; US 2008232470 A1 20080925

DOCDB simple family (application)

KR 2006004073 W 20061010; CN 200680046555 A 20061010; CN 201010237044 A 20061010; EP 06799153 A 20061010; EP 11185698 A 20061010; JP 2008535444 A 20061010; JP 2012101524 A 20120426; JP 2012169947 A 20120731; KR 20060098098 A 20061009; US 8941906 A 20061010